Befor we start the final battle of our current saga, I think it would be well suited if two rips were torn in the space-time continuam. These would lead to Majin Mountain and Ruler Island. This would give everyone a last chance to train, as well as letting those not in the saga to join in on the fun. Also, before it starts, the fighters might want to go and buy some items from Capsule Corp, which, need I remind you, very much existed in the past.