The GMPP LS7 crate engine can be had for under $12,000 right now. Hopefully, the LS9 won't cost too much more.
I think future 5th Gen Camaro owners would be best off just leaving the car stock. But, if you want more power, I think adding 8-10lbs boost to the existing LS3 with conservative timing/tune and methanol will be a more cost effective solution than an entire LS9 crate engine swap.
Unless you can sell the OEM LS3 to offset the cost of the LS9.