Microsoft has the most to prove. They have been promising more investment in games for a some years now and people expect some of these to be coming close to fruition and start being revealed. A lack of any good games again will hurt them badly reputation wise (especially Phil Spencer's) but regardless I dont see it changing their sales much one way or other.

Nintendo doesnt seem to have much going on the 2nd half this year but no doubt they have a big E3 planned. However very positively for them the sales of the Switch are only a little behind the PS4 which is good. This will likely increase significantly once Smash or other games like Poke come in.

Sony dont need to do much. A number of big games have been announced. The demos will be enough. PS4 will continue doing well though it seems the peak was last year.

I voted Sony. As the top dog (in terms of sales), they have the most to lose. I think the market share pie (between MS and Sony) is set for this generation, within a small range. But, if MS can bring 5% of the Sony playerbase into their family with the XBX, that's a big percentage gain for XB. On the other hand, if you own an XBone and haven't jumped in to PS4 yet, you're probably not available for Sony to win over. They had the most powerful system, and the most attractive exclusive lineup for most of the generation. What would make you jump to Sony at this point?
So, Sony has to continue showing impressive games, to further cement their position, and keep people from heading the XBone for the most powerful system.

MS just *has* the most powerful system. You either want it or you don't. We know they can't show a bunch of big games that are about to launch, because we'd already know about the games. Nothing that they can say at E3 can change either of those facts.

Nintendo..... I don't know that they're in direct competition with Sony and MS at this point. They're selling a significantly different platform.

Isn't that what helped Sony in a way to convince people to get a PS4 back in E3 2013? I mean, the big highlights, besides doing the opposite of what Microsoft did (DRM, online-only, etc.),  were Kingdom Hearts 3, Final Fantasy XV, The Order: 1886, and even Destiny to a degree, as it wouldn't be released until September 2014. While Sony showed solid support with the usual CoD, Assassin's Creed, and others to go along with Infamous and Killzone, the games I mentioned from the previous sentence were huge at the time.

And aren't some clamoring for Nintendo to show something in the pipeline beyond 2018?

ms....................... nintendo then sony

Nintendo.

They need to continue with their momentum after BoTW and SMO. They are also the only manufacturer expecting 20m for a single console. Clearly they have something up their sleeves.

Sony and MS are pretty predictable, there might be only a single surprise hit from E3. Other than that it would be gameplay from previously revealed games, release dates, and sequel reveals for their main franchises.

I think Microsoft has the most to prove at E3. Sony and Nintendo do so many other shows throughout the year, Sony with TGS, Parris/Germany, and PSX, and Nintendo with Directs as needed, that they will get the hype when they need it.

Microsoft needs to do something about their first party offerings if they want to be taken serious in the gaming space. I have no fear of Xbox going anywhere as, it is just a closed garden Windows product at this point. But, if they want to keep me in their ecosystem past my Xbox One X's support, they are going to have to do something about their 1st party. First party expereinces are the reason I have PS4/XBO/NSW. If one of them can not deliver their own unique expereinces, then I no longer have any need to continue to buy into their ecosystem.

Three things I would like to see from MS at this E3. A more 1st party games, an Xbox Mobile device, and more Play Anywhere parteners.

They are and they are not.

Ps5 release will be mid or end 2020 so we still have a long way to go,sony is working on a big amount of exclusive games,and def more to be announced.

On the other hand,iam highly confident guerrilla ga mes and santa monica studios are already working on ps5 games.

But just like with tlo2 and uncharted the lost legacy even they could be expanding there teams and also working on smaller ps4 games.

In general this gen is far from over,but it is gearing up for the end.

Tlou2 will be a jan-april 2020 release and the last big game for ps4 from sony.

I feel Sony always need to show a strong presentation. Y'know, for the gamers

The fact Sony isn't at 0 on that poll is bizarre.

Nintendo needs a stromg show as others said. They want to ship 20 million Switch units this year. So I definitely expect some big games to be announced. All be it by a logo.