Is miss A gearing up for a comeback?

miss A just may be gearing up for a comeback!

Suzy and Jia tweeted a photo of themselves, writing,

The sign the girls hold up has the words, "A bad girl, a good girl", similar to missA's debut song "Bad Girl Good Girl". Not only that, it also features an illustrated character painting the letter 'A'.

What do you think? Is miss A about to join the June rush of girl group comebacks or are they hinting at something else?