avengers movie, can it work?

i was thinking today how the new avengers movie is gonna be like. i mean can they really find actors who can fill in the shoes of such characters as, captain america or thor and even if they do find the actors, can the actors pull off the roll? i am an avid marvel comics fan and i really like the avengers comic series, but i always wondered can an avengers movie work? well they did find a solid iron-man in robert downey jr. and edward norton as the hulk brought new depth to a very complex character and hugh jackman has wolverine....perfect! but there are also some flops like ben affleck as daredevil, i loved the daredevil comics before the movie came out, and vinnie jones as the juggernaut... well that sucked and furthermore juggernaut in the original comic story arc is not a mutant, and the movie screwed that up by making juggernaut a mutant. thomas jane as the punisher worked very well, but ray stevenson's as the punisher in the sequel made it lame and the movie had no proper story build up. to me the most perfect comic to movie transition would be the spiderman movies except for venom in the 3rd installment and the fantastic four 1st movie, the second didn't portray galactus very well. so due this observations that i have made, i really hope the avengers movie would be like a spiderman movie transition and not a daredevil type movie transition.