It is a spoiler, but it isn't really that big of a spoiler. It also depends on the game. With tLoZ, some of the different endings are bittersweet.
Just in case someone would feel spoiled about the games. Ocarina of Time, Windwaker, Twilight Princess are pretty good examples.
In my opinion, those may be spoilers, but only with good context for the game/franchise do I consider it damaging. I fully expect BotW to be bittersweet.
Here's a good example of a spoiler that is bad:
A sequel/spinoff of a highly rated game comes out. Let's say its an openworld JRPG. The scenario is that the game releases in Japan, but takes months before it is localized. Ok. Some "fans" who have yet to play the game will go ahead and fully take about the spoilers of the game well before it is localized.Some will even go through lengths to post pictures on articles that do not relate to the game. Some will even put a huge spoiler on their avatar, which is the absolute worst on threads of websites such as this one. Nevermind posting within the week of release when you know full well they haven't beat it, they do it before it is even localized and you know full well they didn't buy it yet and it is in Japanese and they ask in other threads for translasitions for Japanese info of other things. Like why do this? What kind of fan are you? Some people might even debate buying the game because of this.
