Topic on All The Tropes talk:Creating New Redirects
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This would cover titles that use an ampersand (redirect from versions with and), at sign (iDOLM@STER), ligature (Æon Flux/Aeon Flux), or mathematical symbols (While ∀ Gundam's page resides at Turn A Gundam, which is widely used officially, I'm sure there's other examples), and possibly also titles with hyphens instead of spaces (B-Movie vs. B Movie). In practice this is widely done already and seems like it would be better to officialize it than try getting rid of all the examples.