I'd be curious as to how many people who are Jays fans would bail to be fans of Expos2.0. Because you'd have to have been born in the early 80s or beyond to be able to say that you were a fan of an Expos 1.0 for longer than you could've been a fan of the Blue Jays, presuming you were an Expos fan from the time you were born until they left in 04 and a Jays fan from that point onward.
It's like how if Vancouver ever, by some miracle, got an NBA team back I don't think I could switch my primary basketball allegiance back from the Raptors to the local team, in large part because I've now been a Raptors fan for far longer than I was a Grizzlies fan.