The newly addition to the community team of Blizzard, Avarius, answered a forumpost requesting a new battle report. Is he hinting on a 2v2 report next time?

“What match-up would you like to see in the next Battle Report? Would you be interested in a same race match-up? How about a 2v2?” - Avarius, Blizzard.

It is interesting that they are thinking about making a 2v2 battle report, and hopefully we'll see it some day soon. Avarius has also cleared things up on the recently added Changeling;

- "The changeling's transformation is permanent. Once it is within range of opposing forces, it will transform to that race's basic tier 1 unit (marine, zealot, or zergling) and remain so for its duration. In the case of a team game or FFA where there are multiple races, the changeling will transform to the race it encounters first and not change again."
He further answers the question on wether the Changeling will be used in high level 1v1 games and says:

- "I definitely think you will see them used effectively, even in high level 1v1 play. Who wouldn't want an essentially free scout (only costs energy) to use to gather intel on their opponent? With the potential that you opponent might not kill it immediately, it can provide you with a sustained scouting advantage. Even high level players can get caught up in harassment, or base management and may miss this little guy sneaking into their base."

Links
Blizzard.com - Source: Battle Report
Blizzard.com - Source: Changeling