Sure, great, the park is opening when it doesn't have to. But this line-up really is somewhat weaker even than even previous additions of this event, and I'm not sure (despite living relatively locally) I'll actually bother with visiting during the February Half Term period. Like many others, I would've expected Sub Terra and / or Th13teen to be included as a direct replacement for Oblivion, and I'm also relatively surprised at the inclusion of the Runaway Mine Train despite the issues it had with operating in the cold just last year.
I still hope that the event will prove popular, but considering that anybody who knows what they're doing will be paying just £8 more to visit during the main season, I'd be surprised if the demand is there. Maybe this will appeal to the family market? I can't see thrill seekers or teenagers making the trip based on just Nemesis and Air, even for £15.
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Also, on a side-note, I see that Ice Age 4D is listed in the ride selection. This disappoints me slightly, as I was half hoping for the film to be replaced for the 2013 season... unless it's replaced with an Ice Age: Continental Drift attraction, fingers crossed!