I thought it was fairly obvious Rock was going to turn on Roman but just the way the former has been going all out in his heel run, it seems odd to "do a Big Show" and turn him face again quickly.
An idea could be Rock inadvertently costs Roman the title, everything seems clear between the two and then at the end of April, The Bloodline turn on Rock, allowing him to disappear to film a movie until later in the year.
When he returns to cost Roman somehow, the build for WM41 begins.