Emirates are due another upgrade and Thomson are giving package holidays to Dubai a go, so, that's the market surged up for a while yet. That said, Dubai is building up its reputation as a tourist hotspot in its own right, and other airlines manage to serve LHR-DXB just fine despite the soon to be 10 daily LON-DXB. MAN-DXB does have a lot of O&D according to Emirates press releases, so, maybe VS could tap into that.
Anything east with Virgin could either be India, filling the plane with DL connections ex-USA (DL do codeshare with Jet but the size of the market could also use VS at MAN/LHR). Failing that, a 1-2 weekly Male using Virgin Holidays to fill up most seats. Anything other than that I don't think we could see.