Well today I did some research for my Hotwheels wishlist ;-). And I came accross the Drift Master Champion playset.
For me this looks interesing, but only if I can remove the blue launcher in the bottom left corner and replace that with either:
A cross section where it is possible to attatch the normal Hotwheels tracks, although it might need a 1-lane to wider conversion for that on both directions before it would get to the cross section. I am thinking it might be possible to use the Switch It accessory found here (with or without the Switch device):
And an option to use this as an end of track stunt would be to just use a straight track piece (1-lane or wider) and connect that, so when driving to the perpendicular side you just stop there. Although this could stack up too many cars, if there are more than two in a race. Think I like the previous option better.
Even more ideal would be if the track could be approached at the suggested cross section at different heights, but I think the playset is hard plastic and too rigid for that to work though. All in all this is all theory, so if anyone has tried something like this I am curious to see the result.