Why would you wait until then?
1) better value in the summer, more choice too...also helps sales as well as buys.
2) a full pre-season for the newbies to bed in.
3) a brand new season with a proper and prepared Martinez squad.
If Martinez has 20m from Bill to spend in January, he may well have a look but if he doesn't find what he's looking for, he'll save it for the summer. The January window is notorious for:
1) providing bad value (as clubs look to panic-buy)
2) providing flops, as the player has no time to settle into a new system (Jelavic being an exception that proves the general rule)
I expect Bobby to subtly strengthen the squad, with slightly better players replacing Jela & Heitinga, and with one or two more numbers extra to the cause (maybe another loanee).
I'll be surprised if the manager does make a big signing (say 10m+). But I'll trust him it's the right decision if he does so.
If he doesn't, I'll trust that too. And I certainly won't be laying into Kenwright (like I know some of you will).
Saying that, I will lay into the chairman if we don't do some serious business in the summer. But he's earned a ceasefire until then.