Originally Posted by
Phattopia
Or make lich king accessible from the start but the fight is exponentially harder for certain bosses still alive and you'd still have to kill the bosses prior to them to get to the certain boss, examples:
If saurfang still alive, lich king will cast mark of the fallen champion.
If putricide still alive, he will drop puddles of ooze and those orange flasks, sorry forget name.
If blood queen still alive he would cast the pact and fire skills.
If Sindragosa still up he would drop frost tombs and do blistering cold.
Basicly every minute of the fight he would pick a different skill available to his arsenal if the bosses were still up.
And make acheivements too for killing Lich king while Saurfang is still alive.
They should do stuff like this for future content.