I'll probably get blasted for saying this but, It is a good fit: A-Rod moves back to SS, his natural position, and we solve our need at SS for awhile with a good-fielding, good-hitting player with the power to make up for the loss of Manny's bat. A-Rod gets the new venue he desparately needs. Manny gets the spotlight he craves (and can rejoin his pal Johnny D). Then we get a CFer and move Coco to LF. We get better overall offense and defense, and can focus our attention on the pitching staff that failed us so miserably.
A-rod's production (excluding postseason) is the closest to Manny's we can get.
I doubt it will happen unless 1 or 2 more teams were involved, but its just an idea.
I have a feeling that Theo has 1 or 2 blockbuster trades up his sleeve this winter.