Well I dont see how one very powerful hero can take 6 heroes. Thor was(hes dead) no doubt Marvels top dog in the hero deparment and BRB is close to his equal but not quite. Believe it or not Colossus may be the deciding factor here cause the weaker younger version of him went the distance with Gladiator. He is capable of holding his own against BRB and keeping him busy while Wolverine takes a few good slashes. If the X-men all attacked at once like they did to the Sentinel in AXM #8 and like they are trained to do BRB is in trouble. I dont know if BRB can summon the Godforce. Never heard of him using it. Even if it didnt work it wouldnt be a easy fight like most think. The X-men have taken down bigger threats than BRB.