As a gamer, I am not a huge fan of the Blizzard games... all that I tried seemed so polished to death that I didn't kept playing them for even an hour... too boring, too much focused on e-sports, trying too hard to satisfy a mainstream that does not really exist resulting in very childish stories and characters.
And while I have fond memories of the games Activision published in the 90's (R'nR Racing), I also find the current crop rather bland... the yearly CoD clone was about as exceiting as the yearly FIFA clone for far too long, not even the recent entries that seemed to be quite decent can help much to sway my opinion in that regard.
Long story short: I couldn't care less about Activision-Blizzard. The quality of their games IMO is not far from EA shovelware thanks to their dedermination to satisfy the mainstream nowadays. As much as some of their games where genre defining in their own ways (they were never innovative, but they brought genres to the mainstream), if they choke on their King aquisition, I only feel sad for the people working in their studios.
Now, I am no financial expert, but reading some of the experts comments seemed to have made some things clear:
1) Activision bought King at a masive premium... 27% overvalued. Wow.
2) There seems to be a general consensus that King is beyond its peak... with userbase declining. Seeing that Activision most probably wanted to tap into the userbase, this seems to be a problem.
3) Activision and Blizzard IPs themselves seem to be struggling lately, with WoWs End finally seeming nearing, and CoD seeming unable to retain users (who would have thought?)... seems like Hearthstone is doing better, but that most probably cannot fill the void left by WoWs should it really go down in the next few years.
4) Activision has long been indecisive if moving to mobile was its goal, even dismissive of mobile gaming as a whole (which I can understand, its a point of view I share to some degree). this EXPENSIVE 180 turnaround is not seen as only a good thing by many.
5) This whole transaction was most probably just done to please the investors and stock market, which seem to have reacted in a positive way even if analysts where not so positive overall.
I think its the last point that would worry me as an investor (granted, the reason I do care about such things most probably is the reason I am not an investor :))... a company that throws 6b$ out of the window just to gain stronger valuation at the markets is most probably gonna loose money. They will have to deliver something pretty awesome pretty fast or the market will loose confidence again, which could mean the combined market value actually sinks BELOW the original value of both companies. The market is fickle, and wants results fast.
The Facebook effect, where something was completly overvalued and was worth nothing in a short while might happen to Activision too.
Now, just as with facebook, the whole thing could be NOT about the stock markets, making the money lost there irrelevant. Activision still has strong brands that could be used for mobile shovelware (or maybe, just maybe, good mobile games just once in a while) and could aquire a massive fanbase.
Still, I think one commenter hit the nail on its head: "Activision should have spent 500m$ over the last 8 years to move into mobile, than 6b$ in 2015!"...
Activision just bought some 330 million potential new players (granted most of them don't care about console or PC games)
The chance that there is a large overlap between Candy Crush userbase and WoWs/CoD userbase is as likely as finding complex lifeforms on Mars. These are completly different Games and completly different types of players. There will be no synergy.
If Activision has any plan, its most probably expanding its reach to new playergroups its traditional games couldn't reach, not to bring new users to its existing games.... that wouldn't work.