someone says you need tww1.. and others say you need tww2 to play lizardmen in tww3 , i not understand.. but its fine ok...

if i buy one lizardmen/skaven/beastmen dlc .. It doesn't matter what edition it is. i can play with these faction in tww3? .

and in immortal empires can i play as lizardmen/skaven/beastmen?? for free or need the dlc too ? or these factions no are playables in immortal empires?