Particularly, I doubt Alitalia will order 744, because if they had it in mind, they should already have done it a long time ago. Nowadays
just airlines that already operate 744 are buying more in order to complement/expand its services e.g. BA and JAL. But there is a long time that an airline which doesn't already operate B747-400 order it.
The 767 as far as I know, were intruduced in their fleet as an agreement between then and Ansett Australia. But, on the other hand, I read Alitalia ordered 3 more... directly to Boeing, as the results presented on its operation are very positives to Alitalia.
On the short haul sector, they are ordering A320 family to replace its decadent MD80 and DC9. And, as the main objective of an airline today is to form a fleet consisted with the less models that is possible, and with the bigger flexibility possible, I sincerely don't know what would be the place of the 763 in a fleet that seems to be entire Airbus in the future.