The report states the reason for the delay is for «additional development time for the title». (thatvideogameblog.com)
It's likely, though, that the FDS version was incomplete when it was scrapped, and the MSX game's enhancements resulted from additional development time. (dreamandfriends.com)
The French publisher also gave Assassins Creed Origins as an example of a game that was given additional development time in order to fully realise Ubisoft Montreal's vision. (consoleob.com)