A few questions about Dutch...
First off, I had this phrase and I was wondering, "shouldnt wil be wilt?" The phrase was "Niemand wil negentig menu's". Also the possessives skill never touched on any other possessives except for pronoun possessives so I was wondering what are the possessives for nouns singular and plural?
Willen is a funny verb. It's technically a regular verb (as opposed to a strong/irregular verb), but as you noticed, in third person singular it's hij/zij wil not wilt. It's considered regular because the change is so tiny.
http://www.dutchgrammar.com/en/?n=Verbs.Ir01 Here's a page introducing irregular verbs that mentions it.
As for possessive nouns, http://www.dutchgrammar.com/en/?n=Pronouns.po06 should cover it.
Also in this case "menu's" is the plural of "menu", not the possessive. If it were written as menus the u sound would change. However, normally possessives are handled by simply adding an -s to the noun, unless the noun already ends in an 's sound' (s, x, z, or others in loan words), or when the word ends in an open vowel sound. If the word ends in an s sound, only an apostrophe is used (Bush' presidentschap). If a word ends in an open vowel, apostrophe + s is used (Gerda's hond). (Though in general we tend to use van de or van het when not talking about people.)