I can`t speak for others, but the reason I won`t join is simple:
Game 1 will be played on Tuesday @ 17:00 GMT-8 for North America region and 17:00 GMT for Europe region. Game 2 will be played on Thursday at the same times. Broadcasts will be on Wednesday and Friday @ 12:00 GMT - 6.
Those times are impossible for me. I can imagine they are for other players as well.
(Althought I might be wrongly assuming that I would get past stage 1 :p)
EDIT:
I put it on weekends, and people will complain they have activities scheduled for the weekends. The times I placed it at I specifically asked people constantly for about a week, they told me they'd be willing to play after getting off work. Shall I re-ask everyone?
For most of the people I know 17.00 isn`t when they are at home ready to play. Most people (at least in my group of friends) come home between 17.30 en 18.30 and want to have dinner first. I`m still in school and the times I`m home combined with homework I rarely am done before 19.00
I do understand the problem of playing in the weekends. Often people have activities scheduled or are not willing to spend multiple weekends in a row playing a game
So I would do it later on weekdays. Starting around 18.30-19.00 seems better to me.
Edited 5/13/2015 13:51:30