With hindsight, it's very easy to rationalize why it was successful and then say well, it was always going to be successful. If it had been a failure, then the reverse process would be just as easy, and explain why it never really had a chance. For instance, if Jupiter Ascending had been a hit, then I could have come up with several reasons why it would be a hit (Directors of The Matrix, So-hot-right-now-Channing-Tatum, Star-Wars-like space opera story, So-prestige-right now Eddie Redmayne), but it bombed, so it's easy to explain why too (Directors haven't had a hit in over a decade, unoriginal plot, not based on any known property, Channing Tatum not an A-lister that can open a film on his own).

To know whether something was or wasn't risk, it's not very useful to look at things in hindsight. It's much more useful to see what people were saying at the time, what the conventional wisdom was. If the execs ignored what people were saying at the time (rather than the rationalizations that came after) - then it was a risky move. As a matter of record, several, separate... commentators... predicted... failure... repeatedly. I suggest you follow the link for all the reasons stated at the time. It was widely expected to be Marvel's first flop. And it's important to remember that more often than not the commentariat consensus about what will be a flop is right - so bucking conventional wisdom requires courage.