Manchester United have reportedly seen an offer rejected for the Crystal Palace right-back.
United are said to have had an offer of £50 million rejected by Palace on Monday (The Sun).
But speaking to Talksport before those latest reports emerged, Morrison was fearful for his former club's chances.
"I hope not (that Manchester United sign Wan-Bissaka) but I think they will eventually," said the now-retired Crystal Palace academy graduate. "I don’t know because, knowing the chairman (Steve Parish), I think that was the one player he didn’t want to lose in the summer when I spoke to him. Because (Wilfried) Zaha they put a ridiculous amount of money on - over £80m.
"If they both go, it could be a long season. But it’ll be one or the other.
"Aaron Wan Bissaka, if they get to £50 million I think it’s a deal done."
It seems it will take more than that to prise Wan-Bissaka from Crystal Palace.
But it could still prove a steal, either for Manchester United or another of the 21-year-old's alleged suitors, given Morrison's comments.
"Listen, let me tell you something, the kid has got all the attributes to be one of the best right-backs in Europe," he added.
"No chance. Once you think you’ve got past him, he gets his daddy long legs and he manages to win it back. He’s one of the best I’ve ever seen in a one-on-one defending situation."
Manchester United, with whom Zaha had a failed spell at the start of the decade, are looking to replace their former right-back, Antonio Valencia, in the summer transfer window.
The Ecuadorian was released at the end of last season and is now being linked with a move to Sheffield United.
Can Crystal Palace keep hold of Wan-Bissaka?
Have something to tell us about this article?