Damn it, I knew this would happen. Wasn't this meant to be about Activision?
Oh well, responding by game:
Diablo
Actually, I'd put gameplay and story ahead of D2 in regards to D3. I love the flexibility D3 offers via the skill rune system, whereas in D2 it felt like I was being locked into a playstyle, at least if I wanted to actually progress. Oh sure, D2 has 'builds,' but those builds are usually locked to a specific character. In D3, I can change my ability layout as I want to depending on the situation.
As for story, well, again, I'd put D3 ahead of D2's. D3 has received a lot of flak for its story, and people have given reasons why, but...well, D1 barely had a story, I found D2's story to be very lacklustre, D3 felt like the first game in the series that actually had a story.
StarCraft
SC2 has far more in common with SC1 then D3 has with D2. Still, as someone who did enjoy SC1 gameplay, that's a personal boon. The unit combinations I find are more interesting, the pathings improved a lot, and there's numerous other little tidbits. And again, loved the story. SC1's story wasn't bad - in fact, I'd call it good (more than I can say about D2), but for me, SC2 surpasses it on practically every level. By the end of LotV, it had managed to even surpass Warcraft III on the story front. I can recall the 2010s period how it gave me disappointments like Halo 4 and Golden Sun: Dark Dawn. StarCraft II is one of the few sequels I've waited that long for that delivered as much as it did for me.
As for the RTS genre dying...SC2 is king, but I'm left to wonder if that's the case, in regard to the whole "dying" thing. We had Company of Heroes 2 not too long ago, Grey Goo came out recently, there's Ashes of the Singularity and Etherium to consider. None of these have been big hits, but dying? I wouldn't say so. Simpy not as popular as it once was, which can be said for a lot of genres (platformers, MMOs, etc.)
Speaking of which:
Warcraft
Don't play WoW, so this is harder to comment on, but I don't think anyone's arguing that WoW isn't the giant it once was, nor am I ignorant of the issues that people reported in WoD. But people have saying WoW is "dying" since Cataclysm. I'd say the more appropriate analogy is that it's entering middle age. Yeah, you're not as good at 40 as you were at 20, but you're probably a few decades off from entering a stage of life where you're "dying," so to speak. And MMOs much older than WoW are still going (Ultima Online, EverQuest, etc.), so if they can survive on playerbases as small as that, WoW probably could.
As for the movie, well, I'm in the camp of "please don't suck, please don't suck..." If it succeeds, how much credit Blizzard should get is up for debate, but while creator involvement with a game movie can help (e.g. Prince of Persia), that doesn't necessarily mean it's going to be good (e.g. The Spirits Within).
Heroes of the Storm
I don't know if I can call the pricing system unfair? Overpriced? Absolutely (sorry Blizz, I'm not paying $25 for a unicorn mount). But every hero is purchasable through gold, so if we're operating under the assumption that the game is balanced (don't go there, I'm not into balance debates), then I'd say the pricing model is fair in of itself. But, speaking personally, HotS is the only MOBA I've been able to get into (alright, it's a grand total of 3 that I've tried), but I love the game systems myself (map mechanics, shared XP, talent upgrades, etc.)
Overwatch
Again, can't really comment. It's certainly popular right now, but it is a fair point to say it could whizzle away in the future. Personally, doubt it though. If TF2 is to DotA/LoL, then I suppose Overwatch could be akin to HotS/Smite on the relative popularity scale. I'd say that's enough to make it viable.