I love this,
EPFans.info have a full list (correct as of 00:10 on 26/03/2018) of all the additions and changes around the park for the 2018 season:
Abenteuerland: Attachment on the back of the Tarzan & Jane toilet for more storage space
Adventureland: delineation of flowerbeds with a metal border
Germany: Conversion "Old 99 with circus parade" to "Jim Knopf - journey through Lummerland"
Germany: Relocation of the Jingle Jangle Jungle Boys to a vintage car ride with a new stage
Germany: Ceiling at the entrance, repainted at the hubs
Germany: Renovation of the tree root in the last bend of the Elven journey
Germany: New witches house at the last bend of the Elven journey
Germany: New scene and wall decoration at the Elfenfahrt
Germany: New conveyor belt in the station of the Elfenfahrt
Germany: Flooring wooden bridge over Elz to Schloss Balthasar renewed
Germany: Mack Bank Preview Center partly supplemented by exhibits from Historama
Germany: Facade Walter's sausage stall from green to beige repainted
Germany: Sitting area behind Walters Wurstbude supplemented with murals and photos
Germany: New decorative elements in the study room in the waiting area of the Voletarium
Germany: New route, more exhibits and paintings in the hall of the ACE
Germany: New diversified countdown in the Voletarium
England: redesign of the roof area "Arena of Football - Be Part of It!"
England: renaming and transformation "Victoria Station" to "Paddington Station"
England: New Paddington shop and associated remodeling of "Anne's Sweet Kitchen"
England: Newly designed seating area between "Shooting Gallery" and "Info am See"
England: Newly painted carriageway of "Silverstone-Piste"
France: renaming and transformation "Eurosat" to "Eurosat - CanCan Coaster"
France: New French facades ahead of "Eurosat - CanCan Coaster"
France: Separate entrance for Eurosat Coastiality
France: Transformation "Universe of Energy" to "Madame Freudenreich Curiosités"
France: New up to twelve meters high water fountain show
France: Distance of the big bridge from the Eurotower over the lake
France: New elevator for barrier-free access to the Eurotower
France: New boat restaurant with two floors and space for up to 60 people
France: redesign "Old 99" and relocation to subject area Germany
France: rear wall at the Musikpavillion away, unobstructed view of Lummerland
France: new construction and laying of the Flammkuchenstandes
France: area redesigned at the former place of the Flammkuchenstandes
France: Exposure and revision of the steam locomotive
France: Extension at the back of the Bistro La Cigale for more storage space
France: Jingle Jangle Jungle Boys tent pitched on puppet boat ride
France: Figures from "Old 99" in the puppet boat ride
France: Exhibition in the "Mercedes-Benz Hall": "Monaco, # 4theTeam"
France: Color changers illuminate Silver Star-Lift at night.
Greece: Old wooden posts partly replaced by new ones
Greece: Complete renovation of the pier in front of Taverna Mykonos
Grimms Märchenwald: New Meet & Greet Point at the brave little tailor
Ireland: Arranged with carvings in several places
Ireland: Conversion of "Tender Milka World" to "Lindt Maître World"
Iceland: Replaced and renewed large parts of the rail of "WODAN Timburcoaster"
Iceland: Painting on the outside facade of the Monorail Station
Iceland: Conversion "WODAN Video Hus" - Sale of Onride photos now directly in the shop
Iceland: redesign Flammlachs-Stand
Italy: renaming and transformation "Teatro dell'Arte" to "Europa-Park Teatro"
Italy: New floor in the waiting area Ghost Castle and removal of the zigzag railing
Italy: In the last scene in the Ghost Castle a skeleton cage has been added
Italy: Paving in front of the Pizzeria Venezia
iKd Minimoys: Poppy Towers operator's cabin designed as a drink packet (since winter)
iKd Minimoys: Bag racks on the Poppy Towers (since winter)
Luxembourg: Conversion "Historama - The Museum" to "Journey to Rulantica - Preview Center"
Luxembourg: Conversion "Historama - The Show" to "Journey to Rulantica - The Show"
Netherlands: General overhaul of the Koffiekopjes, only 1 exit available
Austria: Trackbed of the Panoramabahn partly renewed
Austria: New Alpenexpress Coastiality Experience "Alpha Mods PD"
Austria: New access for Alpenexpress Coastiality plus
Austria: Conveyor belt for the return of VR glasses under the track of the Alpenexpress
Austria: Route of the Tyrolean whitewater course was equipped with lamps
Austria: New rocks on Tyrolean wild water train with ibex sculpture
Austria: Themed maintenance access at the small drop of the Tiroler Wildwasserbahn
Austria: Renovation and new furniture in the winter garden of the Seehaus restaurant
Austria: Würsteltoni has maintained a firm separation between the sales outlet and the route
Portugal: Basin of Atlantica Supersplash repainted
Russia: Conversion and redesign of "Euro-Mir-Burger" to "CMAK - Russian Food & Burger"
Russia: Shore area redesigned on back of "CMAK - Russian Food & Burger"
Russia: paths partially repaved
Russia: Conversion of "Milka Shop" to "Lindt Magazin"
Russia: New shop for Alpha Mods PD before Euromir
Russia: Relocation of extended waiting area Euromir due to Alpha Mods PD Shop
Russia: New light effects and fog in the Euromir revolving tunnel
Russia: Eurosat bulb now in Euromir station
Russia: Old steering wheel of the Eurosat with light effects in the lift of the Euromir
Russia: New monitors in the photo shop of the Euromir
Switzerland: Conversion "Wallis-Stübli" to "Lindt Stübli"
Scandinavia: Hai photo point has been completely reworked and repainted
Spain: painting on the exterior facade of the Spanish Arena
ALL THE NEW!!
Oh and also, here is the English version of the 2018 Novelties video which I don't think has been posted here yet: