Another variable is the chronological sequence this all takes place in. Is it 35 year old Shatner at DS9, or 62 year old Shatner? If Archer's teamed with Spock, Scott Bakula is about 13.
It's the entire crew from WNMHGB switched with the crew from Emissary.
Personally I think given Kirk's track record with god-like aliens, It'd be reduced to a one-hour episode at the end of which the Prophets agree to close the wormhole and leave Bajor alone, with no series to follow.