One of the other versions on the way is one of the ships in the latest Hot Wheels model starship series. T-Hunted has posted lots of images of this one, showing off the model from all angles:
Thanks to my reader Darth Duranium for pointing me towards this, and also highlighting a curiosity with the Hot Wheels ships: It seems online retailers have withdrawn their pre-orders for the series. Hopefully the fact these images have just been released is indicative the new ships are still coming, maybe just with some delay, or changes to the line-up.
If you're curious, the other Kelvins are the mini Kre-O construction toy (which is out already), and the larger QMx version. The only other Kelvin before now was a caricatured Burger King toy.
For some reason the most glaringly obvious USS Kelvin model, which was product-placed in the first film, the salt shaker version, remains unmade.