It is a nuanced scenario that requires context.
Romero has lost twice to Whittaker and just failed to make weight twice. He is solidly out of the picture.
Jacare just got put away and is completely out of the picture.
Luke is going to be a LHW and is badly injured.
So we only have two top 5 middleweights remotely in contention, and that is Kelvin and Weidman. Neither man has a solid claim if it were not a confluence of events that left them the only two options.
Weidman's last win wasn't just beating Kelvin, but he choked him out in under 3 rounds. That was less than a year ago, you can't just brush it off like it never happened. Neither guy is a particularly deserving candidate and there is a reasonable argument either guy gets the shot.