considering he sent haye out of that sparring session on a stretcher with a knife deep cut over his eye sky should be the limit.
Haye is a bum and coward .. but Wilder is even worse and he didn't throw the punch which leaded to the cut. It was Filip Hrgovic who shattered Haye's glass head.
Showtime/GBP has two "headliners" already on that card, with Hopkins in the main event. Wilder's fight will be the third and won't be a big-enough budget affair to attract a top-tier opponent, particularly on one month's notice like this. More likely a rounds guy or a decent journeyman.