I’d have to see your assignment response to make recommendations! And I probably shouldn’t print my recommendations here publicly, as this company probably wants to keep the assignment confidential. Feel free to befriend me on LinkedIn, and I'll take a look at your assignment and give you feedback.
I don't have a favorite, but Horizon Workrooms has been pretty cool. I was on the launch team (shout-out to Yuxi Wang who was the PMM on the project), and I left a fantastic job on Gaming to work on this project. The technology is incredible and is helping me realize my personal dream of being to work well with anyone, even if we're miles apart. Check out the trailer too!
Customer stories and case studies. Proof!
The public facing spike in the intial phase (hype creation), needs to move on to proof (value creation).
We saw this at Helpshift where the Chatbot product started to fully automate upto 70% of a few customers' inbound customer service chats. This was way beyond what any other product in the industry was able to accomplish.
Once the company had this data, it became very easy and effective to credibly continue to market and sell the product. It was no longer hype, the product performed, it was undeniable.
First of all, don't try to prevent the short term spike! that's why you launch, to drive attention and focus for one thing in the short term.
But how to get long term results: have a plan to continue building momentum. Like for a new product, you want to continue building momentum with content, marketing campaigns, sales team selling it, etc. And don't forget feature launches, if it's a new product, plan the announcement of the product, but then plan follow up launches for new features as you build them.
There is no one-size-fits-all here; this depends on the size of your company (the smaller it is, the easier it will be to keep everyone on the same page) and scope of the launch (the smaller it is, the less necessary it is to get everyone together). What's most important is to set a cadence up-front w/ your XFN stakeholders that makes sense for your org.