If the Rabaul carrier raid missed the Japanese cruisers

What if Saratoga and Princeton could not raid Rabaul and Japanese cruisers moved against Bougainville?

The cruisers could bombard and disrupt the landing, but American heavy forces would respond and the ships could not retake territory alone.

Without the Saratoga-Princeton raid, Japanese cruisers could move against Bougainville and force an American response. Their guns could bombard positions and cause disruption, but cruisers could not take territory by themselves. Stronger and faster American forces would probably intercept them. The estimate is a delay of at most about two weeks, rather than a major change in the outcome.