Oh, before we get too far, was going over my list, and I'm adding something in that I forgot, and wanted to add to my prior progressive but waited too long.
Once you get to the 2000 season, all your "Bring Ahead" players will be gone, and most of your original core as well, and this is a "Time Travel" league that I don't want to turn into a standard progressive, SO, before the 2000 season, you will jump back into the old DeLorean and go back to your teams 1975 season and grab 2 more guys, bring them back and hop right back in and go forward to 2015 and grab 2 guys from there as well, bring them all back to 2000, to help the weakened rosters, again, start them at any point in their career and they will advance 1 year at a time like everyone else.
This is 15 seasons down the road so it shouldn't really affect anyone as to who they take because who knows what will happen by then with trades and whatnot.