Well the nice thing about RPing is, we can work the story around, so that either a 2v1 can happen or a 1v1v1.
Toyo might be first at the island, but there are other NPCs on the Island that can get in the way, before he would even reach/draw out Katakuri. And the Big Mum Pirates have the mirror world, so they can change our oponents pretty easily. I'm sure kaka will be able to work something out.
As for myself, at he moment I dont care (and didnt know before) about any +20 CoO bonus or DF of his, but I want his weapon.
EDIT: I dont want to get into the way of someone elses goal when introducing myself to the RP here. If everything fails, kaka can throw my character into a completely different situation if he chooses too.