I for one would like Bullfrog games to make a comeback. Been taking a trip down to memory lane, and I will say Bullfrogs were the best developers back in the day, and they are still the best in MY book.

Magic Carpet series.
Theme Series, Hospital 2 if possible.
And the latest I've played..

Dungeon Keeper II..

Sadly, Bullfrog is no more, and only Peter Molyneux is around and still kicking around with EA.. Creating Fable 2..