I would like to see the 2fs come out as Gatwick Express sets, assuming Hornby would do the necessary mods.
Given that Hornby have the Railroad Class 73, which included Gatwick Express locos under the Lima brand, a train pack is possible - if they invested in making a GLV. Probably too big an ask and maybe not a big seller, given the regional nature of the train.
If they did do it, the limited pulling power of the 73 suggests the GLV should ideally be a motorised model.
The most striking thing about the new releases is how many are new editions of existing models. Things are tight for Hornby and this is perhaps unsurprising.
In the meantime I shall crack on with finishing my Britannia Pacific GLV and modifying my Dapol Mk2s!