Other games have been made without boss fights.
They sucked, and even a fun game without the extra challenge is sort of like a gang bang porno with 3″ dicks and no money shot.
Give us at least one final boss in any video game.
Otherwise its anti-climactic. You want to avoid something you see as video-game dogma, well maybe there is a REASON that norm exists?
Its like people who want to get rid of all social norms, because to them there is something wrong with a system built in any certain way.
Imagine an Alien monster video game without a boss to fight. Yeah, big let down after you killed 1000+ regular monsters, not getting to take on the really big one.