Potentially the Mega II could have been used to produce future models of the 8-bit Apple II with a very low chip count (and reduced physical size) but instead used for IIe emulation on the Apple IIGS and Macintosh LC with plug-in card, which used a similar all-in-one IC based on it.
It is possible that the Mega II could have been used to create future 8-bit Apple II models with a low component count (and reduced size) but instead was utilized for emulating IIe on the Apple IIGS and Macintosh LC using a plug-in card, which employed an all-in-one IC similar in design.