I dont think Austin will go back to the WWF , And as far as the matches:
1. 5 vs 5 Match
Angle / Austin / RVD / Booker T / Shane
vs.
Rock / Jericho / Taker / Kane / Vince
I think that Booker T and Taker will work themselevs out of the match near the mid-way point like they usaly do. RVD will miss a kick and hit austin and at that point angle will olympic slam him and caus an alliance loss , or a would-be-loss if Goldburg hadnt just speared the ref earl hebner , this would lead to an all out brawl and a disqualification . The alliance will fall apart leading up to the next PPV , while the WWF has its own problems with rock and jericho. If they both go with the falling apart angle , They can end up just sorta merging without merging and end this horible story-line that cannot end in any reasonble way.
If anyone knows the other matches please tell me.