Reconstruction of bandpass filtered signal from decimated version of itself
Zero stuffing (which is what you propose) will cause a lot of harmonics in the upsampled signal.  They will be proportional to the strength of the original signal.  Your brick wall filter (a low pass will do, no need for a bandpass) will greatly reduce them, but won't get rid of them entirely.

Depending on your application, the result of zero stuffing and filtering may be fine.  If not, you could minimize the harmonics with a couple of methods.

You could duplicate samples (original sample+ (n-1) copies.)

You could interpolate (calculate values along the line between sample und sample+1.)

Duplicating is easy and will cost about as much processor time as zero stuffing.
Interpolating would be smoother but would cost more time as you must calculate individual values.