The antonyms for the phrase "more ahead" can vary depending on the context of its usage. In a literal sense, 'more behind' can be an antonym as it implies going in reverse or going back. In a figurative sense, an antonym could be 'less ahead', suggesting that there is less opportunity or potential for something to happen in the future. Alternatively, 'stagnation' or 'no progress' could also be antonyms for 'more ahead' as it implies a lack of forward momentum or growth. Ultimately, the antonyms for this phrase will depend on the context in which it is used, and the opposite of 'more ahead' will be highly subjective.