Some hope!
Definition 1 of 1
Pro Tip 1/3Sarcasm
Often used sarcastically to indicate the opposite of hope; usually that something is unlikely to happen. 
He's going to clean his room without being told? Some hope!
Pro Tip 2/3Colloquial
Considered informal, it's used more in casual conversation than in formal writing or speech. 
You think they'll give us extra vacation days? Some hope!
Pro Tip 3/3Pessimism
Conveys a negative outlook; implies a situation is hopeless or a person is pessimistic about the outcome. 
Winning the lottery to solve our problems? Some hope!