A complete turnabout and resumption of a discontinued service would be very unusual. But if one airline is capable of it, then it is TG.
The more likely result is that TG reconfigures the A345's to something more like the A346's and deploys them on long-haul (but not ultra-long-haul) routes or one-stop routes to the US. That would at least get the birds back in the air without resuming the most gas-guzzling aspects of the ULH operations.