What do you think will happen after mirrodin besieged? We all know that there are two possibilities... New Phyrexia or Mirrodin Pure. Well consider the possibilities, New Phyrexia may include more phyrexian. Mirrodin pure will... you know, the Mirran stuff.
I myself remember what happened after Zendikar and Worldwake... Both Zendikar and Worldwake shared many things like allies and landfall, then Eldrazi came. I expected more allies in eldrazi but nope, not even landfall.
This too could happen to Mirrodin Pure or New Phyrexia, could it not? Anyone agree or disagree?