Is there any glimpse whatsoever of Darth Vader in AOTC?
Nope. Confirmed by the Audio Commentary on the AOTC DVD, Anakin’s shadow on the Lars hovel was not intended to be symbolic of Vader’s, nor was it manipulated in any way to resemble Vader’s. As for glimpses of Vader-esque helmets in AOTC, overzealous fans have mistaken hats for that infamous black helmet.