It's going to be a very tight schedule and nothing can be certain in this regard
Canonical has updated the Linux kernel for the Ubuntu 14.04 LTS development cycle, which is now using the latest stable 3.13.2 version, but this might not be the final build.Following on its promise to try to integrate the latest available Linux kernel into the upcoming Ubuntu 14.04 LTS (Trusty Tahr), Canonical is now updating it constantly with the most recent builds.
“We have uploaded the 3.13.0-8.27 Trusty kernel to the archive which pulled in the latest v3.13.2 upstream stable updates. We are also starting to work on opening up our first v3.14 rebase which will be available from our ubuntu-trusty unstable branch,” said Canonical's Joseph Salisbury.
Ubuntu 14.04 LTS (Trusty Tahr) is expected to arrive on April 17, 2014. Canonical might get to switch to Linux kernel 3.14 if the final version is released on time, meaning before the team hits kernel freeze on April 3.
It's going to be a tight schedule, but it all depends on the number of Release Candidates.