I think if they're going to stick with the alternate universe angle and not take a mirror mirror angle, there will be different characters in the Abramsverse TNG. There would probably be a Data. There would also likely be some of the same characters, or different characters with the same names. Then there will also probably be entirely new characters pursuant to the new timeline.
All that being said, I would kind of hope that they'd streamline the cast a bit, make a stronger focus on Picard and his relationship with Riker (basically co-captains)... LaForge always dragged Data to be on the b-squad during missions, elevate Data's role and just cut everyone else loose. No Worf, no Crusher's, and as much as I love Troi; I think she could go too... but bring back Yar.