I have 100,000 + actual miles on TWA since January, so should be Platinum for next year.

I did not check as to how AA will handle this, but I expect if my actual miles on TWA transfer as actual miles (for flights in 2001) in AA - I should be ok. But until it happens, nothing is "for sure".

I pushed for TWA early platinum as it is easier to get than on AA (with the higher minumum mileage).