problem here with including old school BF1942/DC maps is that this is a 32 player game. I don't think some of those classic maps would carry well with that amount of players. But I would not mind seeing a few BF2/SF maps. Karkand though? No, that is what everyone played for years and it why would we want to go back to spending $50 for a single map.
Maybe, after all, this is a bad idea. I say that because if they don't include Karkand, every baby out there is going to b!tch about "Where is Karkand, this is lame, wtf are these maps?!
But I do like the idea if they DiCE supports user generated maps and the community could build their own, which would allow a heck of a lot more variety...which, I sometimes feel is what really hurt BF2 to begin with, only having a handful of ranked maps, then charging for the expansions.
If they make you pay for DLC maps, they are going to kill those maps before they ever hit the servers because we've already see what happens when people expect something for free, and then get charged for nothing new.