she may got the we will be back but not the eternal warrior special rule...
next comes the kroott tactical battlearmour (maybe a simple krottoxx is enough)
WE Want puny imperial guard such as krieg 21th armoured company or something
(because johnson is big but far from a real battle tank)
Hm... for the hundredth? Please let us more into the background of the characters or maybe hint upon something really special. Please... If you don't like the idea, then how about showing us, who is behind the story?
For the 100th? Hmm, perhaps a more serious spectrum for once. Perhaps the team holding of hordes of kroot renegades (preferably covered in trophies. Skulls, teeth, hands etc.) , desperately signaling a dropship for evac and one or two blokes have gone down in the fighting, blood gushing from their wounds as they crawl back to their friends or firing their pistols into the aliens' faces. If you go with this, I have the perfect color scheme for the renegades. Black skin, white bellies, hair: red at the tips, white eyes and covered in red and black tattoos. They be specifically savage and cruel. I believe it would fit perfectly.
But then, that's just me.
or they have to evade until an arch mechanicus force excavates secretely a necron tomb with the krieg 34th expeditionary force.
then they must run for their lives until the trencheads and dark eldar holds back the necrons then the entire planet is virus bombed by the imperial fleet
(if u lazy enough to not draw a full scale war)
an inquisitorial commando spotted johnsons help signal and they after the renegade mahreen sergeant (with a good krieg grenadier or storm troopers with various characters such as techpriests servitors, commando units armed to the teeth, a battle tank for support or a gunship (more suitable for an inquisitor but a battle tank is easier to draw(ill try-ed both)) a highly characteristic inquisitor(a woman maybe) assasins (the variety is nearly infinite and ill not force u thats just an advice)
or for this team they crashed into the planets surface and searcing for the wraithgate like the elfdars for escape but they have to search for a relic from tha emprah (and they helps johnsons tem in a firefight or vica versa) or they have an arch mechanicus techpriest who mastered the xenobiology and heals Skraat for a little help
so if u like 1 of these ill could help you a bit
but for the 100th we need GUARD
because they are the most conventional but the most badass army
(like krieg what inflicted a nuclear purge on the planets surface rather than surrender or the valhallans because they have the numbers like russians (with chenkov's tundra wolves) or the elysian drop regiments or armageddon steel legions because they fight orks for nearly 100 years countinously or chatachans (but i dont seen a single bush so they are out) but an entire armoured company is the best to be sure to show the might of the imperial guard(because 10000 conscripts with chenkov is very fustrating to draw XD))
(if u think thats not suitable for u i have enough situations teams ideas for imperial forces (even renegade ones) so please reply)
SO.. Keep it up Darius the True in the name of tha EMPRAH