They should have a middle-eastern version of Top Gear -- imagine how much powersliding the presenters can pull off with a Nissan Sentra or something like that.
Top Gear China would be interesting -- a show consists of nothing but people riding around in scooters and Chinese-made VWs crashing into each other. A how-hard-could-it-be Top Gear challenge would be something like crashing a Chinese-made SUV into a wall... And surviving the crash. XD
In all seriousness, I can't see why having a Russian Top Gear is such a bad idea. If they want it, let them have it. It's not like they're showing the Russian version in the States or UK. They have their own language and motoring culture and I don't think there's a need for them to entertain us outside Russia as well, assuming of course if we can understand the language and the jokes.
I certainly wouldn't worry about the Top Gear UK's image being dragged down as well -- there're more than enough viewers to secure TG's existence on the telly. Plus, if I watch any other kinds of variations of Top Gear, like TGA or TGAmerica, why would I think any less of the original UK version?
Speaking of which, Top Gear Canada anyone? Just one hour of the presenters driving around in pick-up trucks towing logs around, while being drunk behind the wheel... Oh God, the horror. Well, at least ice-hockey with cars will be a regular segment.