ありそうな

likely

→ 有る
phrase Rare #42,935
likely Formed from ある (“to exist” or “to happen”) and そう (“seem”); it describes something that seems likely to exist or happen.
JA: 今日は何かいいことがありそうな気がする。
EN: I feel like something good might happen today.

なんか悪い事がありそうなそんな気がした。

I just had a feeling that something bad was going to happen.

明日彼女が来るというのはありそうなことだ。

It is likely that she will come tomorrow.

何か訳がありそうな様子だが何だい

It looks like you have some reason for this—what is it?

— 七人の侍 (1954)

芝居なんかにありそうなことだ

It sounds like something you’d see in a play.

— 生きる (1952)