Finally, how would comic fans and non-comic fans feel towards the swap up?
There were rumors back when there was the "Marvel vs DC" event that a swap would actually happen, with at least one character from each company being swapped, although not those characters specifically. The reactions were as varied among comic fans as with anything. In the comic shop I used to frequent, two very close friends actually almost came to physical blows over the disagreement of it being a good or bad idea (One thought it was a great idea, one thought it would be the worst gimmick since multiple variant covers flooding the market).
I'd personally be rather intrigued at such a swap if the right writers handle it and the storyline doesn't come across as a gimmicky "imaginary tale".