你的想法是对的,原句中的 Maybe 完全可以说成 Maybe so。
Could we say, for example, that those who like bold flavours are bold themselves? Or, that those who like spicy food tend to have a hot temper? Maybe so. Maybe not.
又如(摘自柯林斯《英语语法系列·连词》):
A:You’re probably better equipped to do it than he would be even if he were here. 即使他在这里,你也许比他更有条件做这事。
B:Maybe so. But it’s hard all the same. 可能是这样的。不过也一样难啊。(本句中的 so 也可以省略)