No longer being married to the first spouse guarantees the visa won't be issued, but the discussion here is about the steps to withdraw from one process followed by starting another. USCIS doesn't issue visas. One does not need a translated divorce decree to end a spouse visa process. You can withdraw as petitioner sponsor for any reason. Presumably the divorce decree issue came up in the withdrawal process because the divorce was the reason given for withdrawing from the first visa process.
Since the divorce decree with English translation if not in English will be needed to file a petition for the (evidently intended) next spouse, getting it now makes sense.
No, nothing "automatic" happens to the first petition because a second is filed. Filing a second petition for a new spouse without withdrawing the current petition will just open a can of worms to complicate both.
It's ok to withdraw through NVC, but withdrawing with USCIS is simple and kills both birds with one stone. Withdraw first, then file any subsequent petition, with all applicable divorce decrees being required for any I-130 filing for a spouse.