User blog:Qunow/IMO, If there really exist SAO season 2, the earliest possible time would be July

Official site just said that:

2012年7月から放送されたTVシリーズがBlu-ray＆DVDに収録されたリマスター版で再放送決定！

TOKYO MX：2014年1月9日より 毎週木曜日 23時00分～

BS11：2014年1月2日より　毎週木曜日 24時30分～

which mean:

It's decided to rebroadcast the BD/DVD remastered edition of SAO that once broadcasted on 2012-07

Tokyo MX since 2014-1-9 23:00, BS11 since 2014-1-2 24:30

Considering the fact that it would take 6 months to rebroadcast, and it is quite unlikely to have TV channels broadcasting new season and old season at the same time, so in my opinion, SAO season 2 won't come in April.