And i find the possibility of Hibari joining Tsuna group absolutely ridiculus...
Hibari just broke his own watch and you think he care enough to go search for new ones...
Hibari broke his watch because he couldn't stand the rules of stopping the fight,so if he wants to join the fight he will,without any watch.
The problem is for the people who will fight him,since they can't fight Hibari without being eliminated if it's outside the fight-time(but Hibari has nothing to lose,he is already out the game-or you guys think that Chekerface will appear to protect the partecipants to the game from outsiders...hahahahah yea,like the Vindince).
Why do you think Reborn wanted Hibari to win against Varia?
Because Hibari without the watch would have been trouble for Tsuna team,Hibari is a wild fighter,he now will search for Dino,Tsuna,but not to beg them for new watches,but to fight them.
No Matter how much Reborn wants Hibari to join,Hibari just made it clear he is fed up of the rules of that proxy war,so making him joining team Reborn in base of nothing would be ridiculous.
He simply want to do what he wants to do,without rules,making him trouble,he wants to fight Dino,Reborn,Tsuna,Gokudera,Yamamoto...and you think he'll join that team and not fighting them and doing the good baby during all the war?