how to send a new message to an endpoint, continue with the current one

Hi,

from("direct:start").process(processorA).to(myqueue).processor(processorB);

after processing with processorA I'd like to send a customized message to
the myqueue
and continue with the output of processorA in processorB.

What is the best way to to it in camel?

My first idea was to send it to a seda:queue and create a customized message
there and then send it to myqueue

Thanks for help!