IIRC, AA already stated that they'll issue new AAdvantage numbers to those US accounts that they've absorbed and combine into the AAdvantage account on those cases on which the same traveler had accounts on both airlines.

Reason is that AA's tech people found they had cases of IDENTICAL NUMBERS on BOTH airlines FF systems (already documented on FT).

AA will have to supply an account number to eMiles where to put those deposits...