These two words are not exactly the same.
Without going into detail, it can be said that "Kaiser" was first an electoral and later hereditary title. This one was based on the loyalty of the local political leaders to one of their own. "Führer" on the other hand, means only the leader of a group. The meaning of the word was distorted by the Nazi era. Therefore it won't make sense to use the later one, in order to descripe the leader of an empire.
The word recreation KaiserinReich doesn't make sense at all, because it's gramatically nonsense - 1. There can't be a capital letter in the middle of any word. 2. the gramatical gender is incorrect. 3. The existing word Kaiserreich is plural, your word recreation is singular.
Even Google Translator can translate it more suitable.
For example:
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Nevertheless it's your decision to use it. - Don't use words, just because you like it, at least try to use them correctly.