Santa Claus !!
Is there really a Tomahawk-plus? Product names like Trident and Tomahawk are created in the marketing department. There is some evidence i.e. Reindeer turds falling from the sky that there is something there.
Alpha Networks connected the name Tomahawk-plus with a Broadcom Part BCM56963 in a slide presentation about their products. That part has six 100 Gb/s ports and 48 25 Gb/s ports.
On October 31, 2016 Timothy Morgan wrote an article celebrating the introduction of the Tomahawk-II BCM56970 in which he said:
More evidence ? Arista did a slide show in December 2016 that was focussed on the introduction of new Cavium switches but mentioned in passing the breadth of silicon of which Arista has tasted. Even though Broadcom has not put out a tomahawk-plus press release, Arista is talking: