Will VS going to

Both are correct.

In general, either 'will' or 'going to' are possible in that sentence. We can use either to make predictions, although some users will prefer 'going to' for a prediction is based upon evidence or signs (he's in the water; he cannot swim), or when something is about to happen.

Hus, Cen is right on as usual. However 'is going to' or 'he's gonna' more collo

'Going to' is not 'collo'. Grammatically correct fire officer: I hear creaking! Get back! That building is going to collapse!

'Gonna', on the other hand, is 'collo' in the extreme.

To clarify:
That building is going to collapse (immediately or very soon).
That building will collapse (sometime in the future).

Yes but no, Cen; after all I said 'more', which mens of course, 'more nearly'

That's not true either, if it means anything at all.

Alas Cen alack