在将来应该是in (the) future,没有on the future这种说法.
要么是和其他短语的搭配,如：
You're concentrating on the future.你把注意力都放到了未来之上.
There are two opposing views on the future of the Chinese language here.
对本地华文未来的发展趋势,出现两种全然不同的看法.
Experts on the future are divided into pessimists and optimists.
对未来发展进行预测的专家可分为悲观主义者和乐观主义者两类.