#1 Rich Swann for IMPACT World Champion?

Rich Swann is the best pick to challenge Eric Young for his World Championship, both from the kayfabe and the backstage aspect. Swann made his return from a knee injury at IMPACT Wrestling's Slammiversary PPV, joining Eddie Edwards, Trey, and Ace Austin in the PPV's Main Event to fight for the vacant World Championship.
Things went downhill for Swann soon when Young joined the match as well and viciously assaulted him, leading to the former WWE Cruiserweight Champion announcing his retirement on an episode of IMPACT! Young laid Swann out while the latter was walking up the ramp one last time, and he hasn't been around since then.
It makes complete sense for Swann to make his return and destroy Young, leading to an Unsanctioned match between the two of them. The fact that the bout will have the unsanctioned stipulation adds another layer of intrigue into this rivalry, along with allowing Young to maximize on his Maniac gimmick.
Both these men are great wrestlers and if given the liberty to go All Out (pun not intended), these two will be able to add more prestige to not only their legacy but that of the title as well.