The excitement relates to the Discovery crew encountering the Enterprise and Captain Christopher Pike assuming command of the former. This plays a role in a search for Spock (who may have acted out of concluding that the needs of the many outweigh the needs of the few).
One spoiler is that "Trek" deity Bryan Fuller exceeds all high expectations as to all the above and so much more; seeing the tech. of this show set 10 years before the OS period being so much more advanced, brighter, and bolder than that as to the exploits of Team Kirk remains mind bobbling.
The following trailer for "Discovery" S2 highlights the feature-film production values, the aforementioned OS elements, and the underlying mission that drives much of the action. This is not to mention a taste of the charm and broad appeal of everyone's favorite "Rent" boy Anthony Rapp as Lt. Commander Paul Stamets.
S2 begins with things being relatively back to normal after the S1 parallel universe adventures, conflict with the Klingons, and copious ship-board drama. Things change on receiving a distress signal from the Starfleet flagship Enterprise. Although the ensuing rendez-vous alters the execution of Pike taking charge, this ties into prior unfortunate circumstances leading to Pike being the new boss. Subsequent unfortunate circumstances lead to Pike staying in charge longer than initially anticipated.
These events set the stage for Discovery to take the lead in investigating the phenomenon of seven signals briefly appearing and heralding (pun intended) the arrival of a mysterious entity dubbed The Red Angel. Early indications, including separately finding a crashed Starfleet ship in dire need of aid and a group of humans being rescued and relocated far, far, far from home in the distant past of 2053, are that the angels provides what is needed ala the sapceship Destiny in the "Stargate: SGU" television series.
This presumed guardian also leads the crew to the especially alien homeworld of Commander Saru, who is fresh off a identity-changing incident. This trek involves both a family reunion and unvcovering a hidden historical truth.
Team Fuller expertly builds on this solid foundation by expanding on the themes of the series and the larger "Trek" lore. Much of this revolves around the relationship between Spock (who actively affirms that he likes science) and his adopted sister Discovery First Officer Michael Burnham (Sonequa Martin-Green). S2 provides Burnham massive closure and related inconvenient truths. The lifting of childhood guilt that has haunted her to her present provides little solace. The same is true as to her getting the full LaForge as to an unexpected family reunion
Arguably the best treat revolves around the Pike lore; a sort of a homecoming awesomely ties into the OS even more spectacularly than the "Trials and Tribble-ations" episode of "Star Trek: Deep Space Nine." The "previously on" episode-opening segment on this "Discovery" outing is must-see.
We also get heavy shades of "Terminator" as to Team Pike undertaking numerous "Trek" style life-threatening missions so that the universe can avoid a dark fate. These heroics involving copious amounts of time-travel and physics for dummies further elates the hearts of trekkies and trekkers alike.
The plethora of special features include two separate "Short Treks" that separately feature Saru annoyingly cheerful and flaky Ensign Sylvia "Neelix" Tilly. We also get "Star Trek: Discovery: The Voyage of Season Two," "Enter the Enterprise," and "The Red Angel."
The insufferable Tilly warrants special notice in that she reflects an element of "Star Trek: The Next Generation." That series has the almost as loathsome teen genius/Class-A dork Wesley Crusher, who provides real-life adolescent misfits of science a role model. Tilly serves the vital function of inspiring awkward science geek girls to pursue their dreams despite the social cost of doing so. Like Crusher, Tilly is a valued (and surprisingly liked) member of the Discovery crew.