The phrase "as the biggest question" is correct and usable in written English.
It can be used when introducing a significant or primary question in a discussion or analysis.
Example: "In the context of climate change, the biggest question remains: how can we effectively reduce carbon emissions?"
Alternatives: "as the primary concern" or "as the main issue".
The outcome of G.M.'s offering stands as perhaps the biggest question looming over the I.P.O.
Rees, a 6-foot2, 215-pound senior, heads into the season as possibly the biggest question mark facing a Notre Dame squad eager to show last year's 12-0 regular season was not a fluke.
When all is said, done, and litigated in the case of Stephanie Clifford, who is known professionally as Stormy Daniels, the biggest question might be why the President of the United States didn't just let her talk.
By Amy Davidson Sorkin When all is said, done, and litigated in the case of Stephanie Clifford, who is known professionally as Stormy Daniels, the biggest question might be why the President of the United States didn't just let her talk.
That leaves the identity of which university will become the 14th SEC member and when that will be revealed as the biggest questions in college sports, with many administrators predicting that the answer could trigger the land grab narrowly avoided last summer.
Regardless of whether Lord and Miller reprise directing duties as well, the big question raised by their involvement on "Lego 2" is whether they can pull a rabbit out of their hat once again.
The biggest question, as always, is what is to come.
Battery life is obviously the biggest question as is durability, but we'll have to wait and see until the end of summer when the watch is officially released.
It's also a much more favorable matchup for Mendes, as McGregor's wrestling is the biggest question mark in his game and that is Mendes' background.
