A one off. Loads of players had very good one-off seasons. Clint Dempsey once scored 23 goals in a season for example, but it never meant anything as like Walcott though he couldn't do it again though. If Walcott scored 20+ goals every season people would have rated him. He didn't though did he? He averaged about 10 a season overall.
And there's literally no point in a bet from some stranger that'll take about a decade to complete and we'll all completely forget about. Anyway, I'm confident that Sancho will consistently score around 15/20 goals a season, and get just as many assists, if not more. He's considerably better. Once again, he's absolutely nothing like Walcott as a player. The goal tally thing is irrelevant. The only real comparison is that they're both English forwards.
Guarantee that 95% of City fans on here would want him if he hadn't left the club previously.