No it won't have a pirate theme
Also looking at that whole website basically dedicated to "The Secret Weapon Programme" now.. Don't people think the "Secret Weapon" thing has got quite OTT? A label which never meant anything until Thirteen came along, when Merlin realised it could sell every coaster to fans as a "secret weapon" as if part of a franchise of rollercoasters, no matter what the coasters actually were (as in, Thirteen's coaster was actually less thrilling than the Runaway Train). The Smiler was even called a SW before the final coaster type or location was even decided on.
The fact SW means nothing but PR might be obvious to some, and there's nothing wrong with a bit of fun. But for others it has become some kind of special expectation or classification, as if a panel of coaster consultants have sat around a table in a nuclear bunker and annointed this latest proposal to be "Secret Weapon" worthy. Which is funny, but a load of hot air.
SW1 and SW2 never got beyond drawings stages either, were never put to the Tussauds board, so their forced inclusion to pretend there's ever been a "SW Programme" is silly. It was a bit of fun, but over the last couple years I've seen it turn into another misleading promotional thing to keep geeks in check, just like "Towers Loving Care".
One thing's for sure, its at least a better way of advetising a coaster than the constant "worlds first" taglines! So no complaints there!