The IDF has already started an investigation which was published in Harretz. After a US Veto, the UN, as a body, has no power. Individual states can do what they want, but do not count on the EU or Britian, Maybe some Asian states will?
Iran deal opposition grows among U.S. Republicans, Reuters poll shows (Reuters)
from the article: Diskin to Abbas: Defer UN vote on Goldstone or face 'second Gaza'