Some news extract

[Sergeyan]

Hi.
Here is the passage:

BRISBANE, Australia (AP) — When he leads Australia into a test series on home soil for the first time, Michael Clarke will be dealing with a new coach and at least three teammates on debut against a New Zealand squad growing ever more confident of ending a long drought for visiting teams at the Gabba.

No longer an assembly of the Who's Who of international cricket, Australia's team heads into its summer with a public wondering who some of them are.

I didn't quite understand phrases in bold.
As I understood, the Asutraila cricket team is unbeaten on its soil at the Gabba. And the NZ squad is going to end a long drought and defeat the Australia team on the upcoming test series? Am I correct?

The second one I didnt' understand at all. Well, actually, I understood some, but not in the whole.
An assambly of Who's Who of international cricket - what does this mean in this context?
heads into its summer with a public wondering - didn't understand completely. Is it some kind of a verb phrase?

[Beeesneees]

You are correct about the first quote.

Once the Australian team consisted of very famous cricketers at the top of their game (A Who's Who list is a list of top people). Now many of them are new players at an international level, and they are unknown to the public.
heads into the summer - goes towards the summer (season)
with a public - with the general populace
wondering who they are - curious to know who they are
_________________
Cheers m' dears!

[Sergeyan]

Thank you very much, Beeesneees.