If this is true, then it's a good idea. The park desperately needs support rides, and the situation with COVID has made that even clearer.
With Merlin pausing all future investments for the time being, surely getting in some temp flats is the next best thing? Even better if they prove successful and we get some permanent additions in the future.
Of course they never should've got rid of loads of them in the first place. Boneshaker, Submission, Twirling Toadstool, Ripsaw and even the Cinema should all have been replaced at the time.
Regardless, if true, then this is a good first step towards rectifying that.