Zoro vs King is at BIG risk since Marco joined EARLY for the war...
The reason I advocated Zoro vs King, was because I had the thought Marco would join the Alliance LATE, meaning after the alliance LOSE their invasion and lose this current round of invasion.... And the logical guy to be facing King during that Loss, and getting overwhelmed by him was ZORO
So, if Oda did that, Oda would have made Zoro get his Round 2 against King for Payback, EVEN if Marco joined later... that was my initial assumption
However, because Marco joined EARLY, the idea of First round being a loss, Marco will be involved in it, so Oda can basically just do the SAME THING with Marco vs King
Reducing the chances of Zoro vs King tremendously by just Marco showing up early and not late...
At this moment, it's 50/50 for either Zoro or Marco, with Marco having even an edge, to where I say it's 60/40 because of similarity between Marco and King