The best replacement for sc2 is lol.

The best alternatives to sc2 are rated as following:
★★★★★  lol
★★★★★  sc1
★★★★★  wc3
★★★  bw
★★★  brood war
★  starbow
★  dota 2
★  warcraft 3
★  dow2
  sc3
  sc

Your alternative for sc2 is not listed? Suggest!
Speaking about sc2, one probably shouldn't forget about zerg.

Other search terms related to sc2 and their ratings are:
★★★★★ zerg
You have in mind a companion for sc2 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of sc2 in all years. Click on graph for more.
sc2
lol
sc1