dimel:

1st Quarter (Jan to Mar)

- TVXQ Japan tour

- Super Junior SS4 World Tour will end in 2nd Quarter

- Conclusion of SNSD concerts in Asia

- SNSD Japanese single in March

- TVXQ Japanese single on 14 March

- Super Junior (Donghae & Eunhyuk) Japanese single

- EXO debut

- SHINee Korea comeback

- Telecast of Yoona & Jang Guensuk’s drama, “Love Rain”

2nd Quarter (Apr to Jun)

- f(x) Japanese single, recording has completed

- SHINee Japan Arena Tour

- TVXQ & Super Junior @ Tokyo Dome concert

- SNSD 2nd single

- SNSD US album in June (English version)

3rd Quarter (Jul to Sep)

- SM Town World Tour (almost confirmed Seoul, Tokyo Dome (3), London + more to be added)

- SNSD Japanese album in July

- TVXQ, SNSD, SHINee, f(x) Japanese single & album

4th Quarter (Oct to Dec)

- TVXQ, SHINee single

- EXO debut in Japan (prediction)

- SNSD Japan tour from Oct to World tour

Source: Naver SM board meeting plus grapevine.

Chinese translation: EXO bar

Just for reference only.