I didn't believe he would leave the entertainment industry permanently. From what I remember, he only said he would step away "indefinitely." I don't really care because he's proven that he goes back on his words many times before. Considering his father is now bankrupt, it's only right that he returns to earn some money to help his father out.
I guess the poor guy regretted what he did and now he is just trying to make ends meet, but who knows?
He didn't say he would live the HK entertainment industry forever, just for an undetermined period of time. I'm still looking forward to watch "Sniper". :x