Sonic Generattion: To Have A Dreamcast Era?

I was reading up on information about Sonic Generation, and I read that the game is going to have a "Dreamcast Era."Do you guys think this is true? Will we be seeing levels from Sonic Adventure 1 & 2 in this game?

I'll be like, whoo!, and I hope Sega brings in some adventure fields.

Those warehog levels were fun.

Anyways, levels from Sonic Adventure 1 & 2?

I think that would be cool, since Sonic Adventure 1 and 2 are actuallythe most nostalgic Sonic games for me, and still pretty fun. To see some aspects from those, like remade stages, would be awesome for me.