hard to say till they announce something concrete about point costs per nt, club level options and so forth. i suspect BLT will still be very in demand since it's possible to walk to MK from BLT and not possible from VGF.
might not be a lot of cross-over between BLT and VGF demand as the styles of resort will be fairly different.
but anyway, here's the main VGF thread for more info and speculation: