I could definitely see the potential for a double dip on the V344 Luke. The landspeeder comes with his rifle. But then I think about the TVC release from around 2011, and there was no pack-in figure.
It feels like the carded pack-ins w/ repacks or retools have become the norm now though w/ vehicles and beasts. It seems like an easy way for Hasbro to justify raising the cost of the base item and it gets "carded completionist" collectors who wouldn't normally buy a vehicle to purchase one, and the "loose & carded completionists" to buy two. And with the rumored higher pricepoint on the Landspeeder, I think we can fully expect one.
Honestly I'd be good with any of the suggestions so far. If it does end up being a Sandtrooper, I'd want it to be the officer and then they can issue the grunts as a basic figure.
