Can't confirm the rumour I'm afraid, but Monarch have been using the A330 quite extensively from MAN & LGW on the European shorthauls this Summer, perhaps they have proved their versatility?
If they got a good deal selling off the A300s then I imagine a couple of redundant nearly-new A332s wouldn't be hard to come by in the present marketplace at a reasonable lease cost.
Would be interesting to hear the official story from anyone at Spotty M though.