Who will be the next parliamentary opposition leader?

When PAS won the most seats in 1999, they were the parliamentary opposition leader.

When DAP won the most seats in 2004, they were the parliamentary opposition leader.

In this 2008 General Elections results, PKR has secured the most seats among the 3 main opposition parties (see below from SPR).

So does this mean a PKR parliamentarian will be the parliamentary opposition leader?