This past Monday on Raw, Apollo Crews suffered a knee injury during his United States Championship match with Andrade which forced him to drop out of next month's Money in the Bank Ladder match.
As a result, his replacement will be decided during next week's episode of Raw.
It was announced on WWE's The Bump that a Last Chance Gauntlet Match will take place, with the winner taking that final spot in the men's Ladder Match. The participants have yet to be officially announced, but the title of the match suggests they'll be the losers of the previous qualifying bouts. They include Cesaro, MVP, Austin Theory and Drew Gulak.
As far as we know, Crews' injury is a work, so we're not sure why he was taken out of the MITB match - especially when he didn't make way for a surprise entrant. There's speculation that his frustrations may lead to a heal turn, so perhaps we'll see him interfere in this Gauntlet Match on Monday.